posterior communicating artery in dogs

One of a pair of right-sided and left-sided blood vessels in the circle of Willis. It connects the three cerebral arteries of the same side. Anteriorly, it is one portion of the terminal trifurcation of the internal carotid artery. The anterior cerebral artery and the middle cerebral artery are the other two branches of the trifurcation. Posteriorly, it communicates with the posterior cerebral artery. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the posterior communicating artery is

One of a pair of right-sided and left-sided blood vessels in the circle of Willis. It connects the three cerebral arteries of the same side. Anteriorly, it is one portion of the terminal trifurcation of the internal carotid artery. The anterior cerebral artery and the middle cerebral artery are the other two branches of the trifurcation. Posteriorly, it communicates with the posterior cerebral artery. The atlas records it as a artery at the organ scale in the dog.

Where the posterior communicating artery is

It sits within the cardiovascular system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What the posterior communicating artery connects to

The atlas records 5 typed relationships for it, across 2 kinds of connection. part of anatomical entity and circle of Willis.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the posterior communicating artery. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as caudal communicating segment, posterior communicating segment of the basilar artery, PCA, PCS and arteria cerebri communicans posterior. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0001628, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

Questions

Where is the posterior communicating artery?

It sits within the cardiovascular system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What does the posterior communicating artery connect to?

Part of: anatomical entity and circle of Willis.

Is the posterior communicating artery the same in other species?

This page describes the dog. The human record of the same structure sits beside it on /compare, over one shared model rather than two atlases built separately.